Measurement of argon excimers, Ar2 *, in a cold atmospheric plasma jet using cavity ringdown spectroscopy

被引：3

作者：

Nave, A. S. C. ^{[1
]}

Wubs, J. R. ^{[1
]}

van Helden, J. H. ^{[1
]}

机构：

[1] Leibniz Inst Plasma Sci & Technol INP, Felix Hausdorff Str 2, D-17489 Greifswald, Germany

来源：

APPLIED PHYSICS LETTERS | 2023年 / 123卷 / 18期

关键词：

ABSORPTION-SPECTROSCOPY;

D O I：

10.1063/5.0173740

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The argon excimer (Ar-2*) species is considered to play an important role in the chemistry of cold atmospheric plasma jets, notably in the formation of reactive oxygen and nitrogen species. In the present work, we demonstrate that cavity ringdown spectroscopy can be used to detect and quantitatively measure Ar-2* in the effluent of a cold atmospheric plasma jet, the so-called kINPen-Sci. The spectroscopic features of the 5p pi(3)Pi(g) <- a(3)Sigma(+)(u)Delta nu = 0 and 7p sigma(3)Sigma(+)(g) <- a(3)Sigma(+)(u) (nu ' - nu '') systems were clearly identified allowing unambiguous assignment to the Ar-2* species. A predominant absorption feature at 512 nm was used to determine the integrated density along the axis perpendicular to the gas flow. Assuming a homogeneous density distribution in the kINPen-Sci effluent, Ar-2* densities from 1.8 x 10(11) molecule <middle dot> cm(-3) at 0 mm to 1.3 x 10(10) molecule <middle dot> cm(-3) at 4.2 mm below the nozzle tip were determined.

引用

页数：4

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